Compilare: user.cpp: In function ‘int main()’: user.cpp:14:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[ s[i] ]++; ^ user.cpp:31:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol+=f[ a[i] ]; ^ user.cpp:35:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[ a[i] ]=b[i]; ^ user.cpp:39:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] L[i]=i-f[ s[i] ]; ^ user.cpp:42:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] R[i]=i+f[ s[i] ]; ^